We propose a transmission-based dispersion compensator employing an apodized, unchirped fiber Bragg grating (FBG). A theoretical model for dispersion compensation in transmission based on the dispersive properties of the periodic structure is developed. A figure of merit is defined for optimization of the grating parameters for maximum recompression of dispersion-broadened optical pulses in lon...

Figure l(b) shows the wavelength-dependent time delay under different stretching voltages. The slope of the curve (i.e., the dispersion) at the operating laser wavelength can be changed by varying the PZT voltage. This grating enables compensation of dispersion accumulated for various distances as well as the dispersion accumulated in multiple subcarriers. Figures 2(a) and 2(b) show the effect ...

In this paper, we present the simulative analysis of 32 × 2.5 Gb/s DWDM metro system with 100GHz channel spacing using SMF-28 and the Negative Dispersion Fibre (NDF) such as MetroCor which enhances the capabilities of the metropolitan area optical systems while at the same time reducing the system cost by eliminating the need of dispersion compensation. It is observed that MetroCor fibre outper...

The performance of long-haul coherent optical fiber transmission system is significantly affected by the equalization enhanced phase noise (EEPN), due to the interaction between the electronic dispersion compensation (EDC) and the laser phase noise. In this paper, we present a comprehensive study on different chromatic dispersion (CD) compensation and carrier phase recovery (CPR) approaches, in...

Chirped fiber Bragg grating (FBG) provides an attractive solution for low cost dispersion compensation in a fiber optic transmission system. The present work carries out the design optimization of a chirped FBG in respect of chirp bandwidth and apodisation profile in achieving optimum dispersion compensation in a 40Gbps optical transmission link for different modulation formats.

In this paper, a new structure is provided for the dispersion compensating photonic crystal fibers in order to broaden the chromatic dispersion and increase the dispersion compensating capability in a wide wavelength range. In the structure, putting a combination of circular holes and a star structure in the inner core clad causes the dispersion coefficient profile to be broadened, and addition...

In this paper we present a comparative study in order to specify the influence of equalization enhanced phase noise (EEPN) for preand post-compensation of chromatic dispersion in high capacity and high constellation systems. This is – to our knowledge – the first detailed study in this area for pre-compensation systems. Our main results show that the local oscillator phase noise determines the ...

Efficient reflection grisms for pulse-compression and material-dispersion compensation have been designed and demonstrated in a 40 fs, 300 microJ, 5 kHz downchirped pulse amplification system for the first time to our knowledge. A grism design for 800 nm femtosecond laser pulse dispersion compensation applications is realized by using standard, commercial diffraction gratings.

Lamb-wave testing for structural health monitoring is complicated by the dispersion nature of the wave modes. The dispersion effect will result in a propagated wave with longer time duration, deformed envelop shape as compared to its excitation counterpart, and hard to be interpreted. This paper first reviews the dispersion compensation and removal algorithms. Second, it compares these two meth...